In mobile phone with wearable device wearable Bluetooth Bluetooth pass assets (picture, etc.)

When developing Android Wear programs, it is often necessary to transfer pictures via assets bluetooth.

1. Create asset, use create ... () method, such as passing a bitmap transmission as follows

private static Asset Createassetfrombitmap (Bitmap Bitmap) {    final bytearrayoutputstream bytestream = new Bytearrayoutputstream ();    Bitmap.compress (Bitmap.CompressFormat.PNG, bytestream);    Return Asset.createfrombytes (Bytestream.tobytearray ());}

The asset is created and you need to point it to a data item by using the Putasset () method as follows

Using putdatarequest

Bitmap Bitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.image); Asset Asset = Createassetfrombitmap (bitmap); Putdatarequest request = Putdatarequest.create ("/image"); Request.putasset ("Profileimage", asset); Wearable.DataApi.putDataItem (mgoogleapiclient, request);

Useputdatamaprequest

Bitmap Bitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.image); Asset Asset = Createassetfrombitmap (bitmap); Putdatarequest request = Putdatarequest.create ("/image"); Request.putasset ("Profileimage", asset); Wearable.DataApi.putDataItem (mgoogleapiclient, request);

Useputdatamaprequest

Bitmap Bitmap = Bitmapfactory.decoderesource (Getresources (), r.drawable.image); Asset Asset = Createassetfrombitmap (bitmap); Putdatamaprequest DataMap = putdatamaprequest.create ("/image");d Atamap.getdatamap (). Putasset ("Profileimage", asset ) Putdatarequest request = Datamap.asputdatarequest (); pendingresult<dataapi.dataitemresult> Pendingresult = Wearable.dataapi        . Putdataitem (MGoogleApiClient, request);

2. Watch-End receiving asset

@Overridepublic void ondatachanged (Dataeventbuffer dataevents) {for (dataevent event:dataevents) {if (Event.gettyp E () = = dataevent.type_changed && event.getdataitem (). GetURI (). GetPath (). Equals ("/image")) {Datamapite      M datamapitem = Datamapitem.fromdataitem (Event.getdataitem ());      Asset Profileasset = Datamapitem.getdatamap (). Getasset ("Profileimage");      Bitmap Bitmap = Loadbitmapfromasset (Profileasset); Do something with the bitmap}}}public bitmap Loadbitmapfromasset (Asset Asset) {if (Asset = = null) {th    Row new IllegalArgumentException ("Asset must be Non-null");    } connectionresult result = Mgoogleapiclient.blockingconnect (Timeout_ms, timeunit.milliseconds);    if (!result.issuccess ()) {return null; }//convert asset into a file descriptor and block until it's ready inputstream Assetinputstream = Wearable.dataapi        . Getfdforasset (mgoogleapiclient, asset). await (). getInputStream ();    Mgoogleapiclient.disconnect ();        if (Assetinputstream = = null) {LOG.W (TAG, "requested an unknown Asset.");    return null; }//decode the stream into a bitmap return Bitmapfactory.decodestream (Assetinputstream);}

In mobile phone with wearable device wearable Bluetooth Bluetooth pass assets (picture, etc.)